Contains Urea Peroxide to safely & effectively remove intrinsic stains from beneath the surface of tooth enamel Works well with Professional Whitening Toothpaste for safe & superior whitening Does not cause sensitivity Reveals white & clean teeth To use: On a dry toothbrush, place a pearl size drop of Whitening Toothpaste & Whitening Accelerator. Brush in a circular motion for 2 minutes. Rinse with water